A method for execution by one or more processing modules of one or more computing devices of a dispersed storage network (DSN), the method begins by determining a slice name of an encoded data slice to verify, obtaining the encoded data slice and compressing the encoded data slice to produce a compressed encoded data slice, determining a storage set of DS units associated with the slice name, sending compressed encoded data slice partial request messages to the storage set of DS units, and receiving at least a decode threshold number of compressed encoded data slice partial response messages to produce compressed encoded data slice partials. The method continues by determining whether a sum of the compressed encoded data slice partials compares favorably to the compressed encoded data slice and indicating a failed test when the comparison is not favorable and indicating a passed test when the comparison is favorable.

The disclosed computer-implemented method for load balancing backup data may include (1) receiving a request to backup files in a multi-node computing cluster, (2) identifying a backup distribution of the files among multiple backup clients, (3) reading an initial data block of a current file from a data node in the cluster, (4) reading a copy of the initial data block of an additional file from another data node in the cluster, (5) reading a subsequent data block of the current file from the data node in the cluster, and (6) balancing backup of the current and additional files among the data node and the another data node by reading a copy of a subsequent backup data block of the additional file from the another data node in the multi-node computing cluster. Various other methods, systems, and computer-readable media are also disclosed.

A computer-implemented method for redistributing data between memory clusters in a key value store. The data is redistributed according to a load balancing algorithm. Memory clusters are sorted into lists according to the number of intervals each cluster contains. Migration jobs are created by the load balancing algorithm to push data fragments from a larger cluster to a smaller cluster. Data fragments, or intervals, are selected for migration according to corresponding data fragments on a target cluster or the number of occupying data fragments on a target cluster. The redistribution of data helps avoid fragmentation of key ranges of intervals, decrease the overall number of non-adjacent key ranges, and to conform to the routing table requirements.

Methods, non-transitory computer readable media, and computing devices that facilitate copy-free data migrations across filesystems. In a first step with this technology, a first set of filesystem metadata associated with a first filesystem is received. At least a portion of the first set of filesystem metadata is retrieved from a first data structure associated with the first filesystem. The first set of filesystem metadata includes a first identifier and a physical location associated with user data. A second identifier, associated with a second filesystem having a different addressing scheme than the first filesystem, is generated from at least the first identifier. A second set of filesystem metadata including the second identifier and the physical location is stored such that at least the second identifier is stored in a second data structure associated with the second filesystem.

The system includes a data synchronization module and a heat data module. The data synchronization module is configured to communicate with a first storage volume and a second storage volume to provide a backup for the first storage volume by synchronizing information from the first storage volume to the second storage volume. The information includes at least one of data chunks, heat map data, and first metadata relating to the first storage volume. The heat data module is coupled to the second storage volume to read the first metadata and the heat map data and adjust a location of at least one of the data chunks in the second storage volume based on the heat map data.

The present disclosure includes apparatuses and methods related to a command bus in memory. A memory module may be equipped with multiple memory media types that are responsive to perform various operations in response to a common command. The operations may be carried out during the same clock cycle in response to the command. An example apparatus can include a first number of memory devices coupled to a host via a first number of ports and a second number of memory devices each coupled to the first number of memory devices via a second number of ports, wherein the second number of memory devices each include a controller, and wherein the first number of memory devices and the second number of memory devices can receive a command from the host to perform the various (e.g., the same or different) operations, sometime concurrently.

According to one embodiment, a memory system includes a nonvolatile memory and a controller. The controller manages first account information to be used for authentication of a first account and second account information to be used for authentication of a second account. The controller receives third account information from a host device. When the third account information matches the first account information, the controller permits access to at least a partial storage area of the nonvolatile memory based on a request from the host device and transmits first data that includes the second account information to a first memory system.

A host of a storage system is coupled to multiple SSDs. Each SSD is configured with a migration cache, and each SSD corresponds to one piece of access information. The host obtains migration data information of to-be-migrated data in a source SSD, determines a target SSD, and sends a read instruction carrying information about to-be-migrated data and the target SSD to the source SSD. The source SSD reads a data block according to the read instruction from a flash memory of the source SSD into a migration cache of the target SSD. After a read instruction is completed by the SSD, the host sends a write instruction to the target SSD to instruct the target SSD to write the data block in the cache of the target SSD to a flash memory of the target SSD.

Devices and techniques are disclosed herein for more efficiently exchanging large amounts of data between a host and a storage system. In an example, a read command can optionally include a read-type indicator. The read-type indicator can allow for exchange of a large amount of data between the host and the storage system using a single read command.

In one embodiment, a block data transfer interface employing offload data transfer engine in accordance with the present description includes an offload data transfer engine executing a data transfer command set to transfer a block of data in a transfer data path from a source memory to a new region of a destination memory, wherein the transfer data path bypasses a central processing unit to minimize or reduce involvement of the central processing unit in the block transfer. In response to a successful transfer indication, a logical address is re-mapped to a physical address of the new region of the destination memory, instead of a physical address of the original region of the destination memory. In one embodiment, the re-mapping is performed by a central processing unit. In another embodiment, the re-mapping is performed by the offload data transfer engine. Other aspects are described herein.